mdm and nvidia libGL problem

Hello,

I use webkit mode of mdm to login to Linux Mint. But I got a probability error:

[  104.541970] mdmwebkit[1812]: segfault at 8 ip b495c553 sp bf9ea850 error 4 in libGL.so.304.88[b48da000+ad000]

It seems to happen in LibGL.so.304.00 library. Since I cannot get the source code of nvidia LibGL, I have no idea what is happened.

The same post on: https://bugs.launchpad.net/linuxmint/+bug/1188387

Will somebody help me? Any suggestion will be appreciate.